Backpack



FIG. 1 is a front and top perspective view of a backpack, showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of a portion labeled, ‘FIG. 9’ in FIG. 1; and,

FIG. 10 is an enlarged view of a portion labeled, ‘FIG. 10’ in FIG. 2.

The dashed broken lines in the figures illustrate portions of the backpack that form no part of the claimed design. The dash dot dash lines in FIGS. 1, 2, 9 and 10 are for the purpose of depicting the cut line of the enlarged view and form no part of the claim. 

CLAIM The ornamental design for a backpack, as shown and described. 